SECTION 1. Subsection (b) of section 61 of chapter 90 of the General Laws, as appearing in the 2018 Official Edition, is hereby amended by striking out the words “assault weapon”, in line 13, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 2. Section 121 of chapter 140 of the General Laws, as so appearing, is hereby amended by striking out the definition of “Assault weapon”.

SECTION 3. Said section 121 of said chapter 140, as so appearing, is hereby amended by striking out the definition of “Large capacity weapon” and inserting in place thereof the following definition:-

“Large capacity weapon”, any firearm, rifle or shotgun: (i) that is semiautomatic with a fixed large capacity feeding device; (ii) that is semiautomatic and capable of accepting, or readily modifiable to accept, any detachable large capacity feeding device; (iii) that employs a rotating cylinder capable of accepting more than ten rounds of ammunition in a rifle or firearm and more than five shotgun shells in the case of a shotgun or firearm; or (iv) any rifle or shotgun containing a semiautomatic mechanism. The term “large capacity weapon” shall be a secondary designation and shall apply to a weapon in addition to its primary designation as a firearm, rifle or shotgun and shall not include: (i) any weapon that was manufactured in or prior to the year 1899; (ii) any weapon that operates by manual bolt, pump, lever or slide action; (iii) any weapon that is a single-shot weapon; (iv) any weapon that has been modified so as to render it permanently inoperable or otherwise rendered permanently unable to be designated a large capacity weapon; or (v) any weapon that is an antique or relic, theatrical prop or other weapon that is not capable of firing a projectile and which is not intended for use as a functional weapon and cannot be readily modified through a combination of available parts into an operable large capacity weapon.

SECTION 4. Section 123 of said chapter 140, as so appearing, is hereby amended by striking out the words “assault weapon”, in lines 146 and 147, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 5. Section 131M of said chapter 140, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 2, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 6. Said section 131M of said chapter 140, as so appearing is hereby further amended by striking out the second paragraph and inserting in place thereof the following paragraph:-

The provisions of this section shall not apply to: (i) the possession by a law enforcement officer, as defined in section 1 of chapter 6E or (ii) the possession by an individual who is employed by a state or federal government agency and is not otherwise prohibited from receiving such a weapon or feeding device from such state or federal government agency.

SECTION 7. Section 131Q of chapter 140 of the General Laws, as appearing in the 2018 Official Edition, is hereby amended by striking out the words “assault weapon”, each time they appear, and inserting in place thereof, in each instance, the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 8. Section 17 of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, each time they appear, and inserting in place thereof, in each instance, the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 9. Section 18 of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, each time they appear, and inserting in place thereof, in each instance, the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 10. Section 18A of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 8, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 11. Section 21A of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 15, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 12. Subsection (b) of section 22 of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in lines 28 to 29, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 13. Section 24B of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 9, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 14. Section 26 of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, each time they appear, and inserting in place thereof, in each instance, the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 15. Subsection (b) of section 39 of chapter 265 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 22, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 16. Section 14 of chapter 266 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 10, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 17. Section 17 of chapter 266 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 7, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 18. Section 18 of chapter 266 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 9, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 19. Paragraph (1) of subsection (b) of section 14 of chapter 269 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon, as defined in section 121 of chapter 140”, in line 15, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 20. Subsection (b) of section 25 of chapter 279 of the General Laws, as so appearing, is hereby amended by striking out the words “assault weapon”, in line 18, and inserting in place thereof the following words:- any rifle or shotgun containing a semiautomatic mechanism.

SECTION 21. This act shall take effect 1 year after passage.